Fluid-pressure brake.



PATENTBD APR. 26, 1904.

J. w. CLOUD. FLUID PRESSURE BRAKE.

APPLICATION FILED AUG. 29, 1903.

K0 MODEL.

fi lI: ll IF If If I! 1T J1 V (My (w 3 8 x mtu Q. I l I 9 l 5 1 "=7 I Q 70 q 12 I5 X WITNESSES INVENTOR ##W J M I UNITE STATES Patented April 26, 1904.

PATENT OFFICE.

JOHN IV. CLOUD, OF LONDON, ENGLAND, ASSIGNOR TO WESTING- HOUSE AIR BRAKE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

FLUID-PRESSURE BRAKE.

SPECIFICATION forming part of Letters Patent No. 758,049, dated April 26, 1904.

- Application filed August 29, 1903. Serial No. 171,246. (No model.)

erated to apply the brakes in case of derailment or by engagement with a device located along the track when the train runs past a signal set at danger.

In the accompanying drawings, Figure 1 is a diagrammatic representation of a car having a train-pipe provided with my improvement; Fig. 2, a side elevation of my improved valve device; and Fig. 3, a central vertical section taken on the line m of Fig. 2, a portion of the valve being shown in elevation.

As is usual in devices of this class the trainpipe 1 is provided with a branch pipe 2, extending down to a point near the road-bed, and the valve is secured at the end of the branch pipe with a lever hanging downward in such a manner as to engageaprojection or tripping device located along the track.

According to my invention that part of the valve device which is attached to the branch train-pipe is constructed in a somewhat similar manner to an ordinary WVestinghouse hosepipe coupling comprising a head 3, having the usual gasket 4, surrounding the opening in the head.

The coupling-head is provided with an arm 5, which extends down in front of the opening in the coupling-head and carries a pin or stud 6, on which is pivotally mounted the valve and lever which is similar in form to the ordinary dummy coupling. The valve portion 7 is arranged to seat over the opening in the head and make a tight joint with the gasket a, while the lever 8 extends downward to a point near the road-bed.

In order to maintain the valve closed, the

lever is provided with suitable projections 9 and 10, adapted to engage the lug 11 on the cam and the lug 12 on the head, respectively, when the lever is in its verticalor midposition, thereby clamping the valve face tightly against the gasket. A lug 13 on the lever carries a pin 14 with a spring 15 for normally holding said pin in engagement with a groove 16 in the arm 5, thus forming a yielding stop for maintaining the lever in its vertical position.

The operation of the device is as follows: When the lever engages a tripping device or a stationary object along the track or road bed, it is rotated in one direction or the other from its normal vertical position on the supporting-stud, so that the locking projections 9 and 10 of the lever are disengaged from the lugs 11 and 12 on the head, thus releasing the clamping mechanism, and the valve then being free to slide backward on its pivot the compressed air forces it away from the opening, so as to permit the escape of air from the train-pipe, thereby applying the brakes.

The projections 9 and 10 are beveled on both sides, so that the valve-lever may be easily rotated on its stud to cause said projections to reengage with the lugs and close the valve when the brakes are to be released.

It will now be seen that by means of this construction I have provided a very simple and inexpensive form of valve device, which may be readily applied and one that will 0perate with certainty.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A valve device for fluid-pressure brakes, comprising a coupling-head connected to the train-pipe, a loosely-mounted valve, means for clamping the valve tightly over the orifice in the coupling-head and means adapted to be operated by engagement with an object along the track for releasing said clamping means.

2. A valve device for fluid-pressure brakes, comprising a coupling-head connected with the train-pipe and having an opening or orifice surrounded by a gasket, a pivotally-mounted valve having. clamping mechanism for holding the valve against the gasket and a depending arm or lever adapted to engage an object along the track and release said clamping mechanism by a partial rotation of the valve.

3. A valve device for fluid-pressure brakes, comprising a coupling-head connected with the train-pipe and having an opening therein, a valve pivotally mounted concentric with said opening, a lever for rotating the valve, said lever and head being provided with interlocking projections and lugs for clamping the valve tightly over said opening.

L. A valve device for fluid-pressure brakes, comprising a head communicating with the train-pipe and having an opening therein, a

valve and lever pivotally mounted over said opening, a clamping mechanism for holding said valve tightly against said opening when the lever is in its normal position, and means for releasing said valve when the lever is turned in either direction from its normal position.

5. A valve device for fluid-pressure brakes, comprising a head connected to the train-pipe and having an opening therein, an arm extending opposite said opening, a valve pivotally mounted on said arm, interlocking projections and lugs for clamping the valve-face against the opening when the valve is in its normal position and means for disengaging said projections and lugs when the valve is rotated in either direction from its normal position.

6. A valve device for fluid-pressure brakes,

comprising a head connected to the train-pipe and having an opening therein, a valve loosely mounted over said opening, clamping mechanism for holding the valve closed against the opening when in its normal position, a yielding stop for maintaining the valve normally in its normal position, and means for rotating said valve in either direction from its normal position to release said clamping mechanism.

In testimony whereof I have hereunto set my hand.

JOHN W. CLOUD.

Witnesses:

R. F. EMERY, EDWARD A. WRIGHT. 

